This extra small, versatile cordless laser light is the world's first 3-in-1 Rechargeable Laser! Over 10,000 hour laser life; no outside batteries needed. Laser has three interchangeable screw-in heads/lenses: a 1mm laser dot, 1mm laser line, 1mm laser cross hairs. No tools necessary! Perfect for sewing, quilting, machine embroidery, crafting and more. In addition to the Dot, Line, and Cross Hairs screw in heads, this kit includes a rechargeable high-capacity battery with USB charging cable (3 hour recharge time); 100 accurate alignment stickers; adhesive magnet and US standard wall plug. The magnetic ViviLux Laser is intended for vintage, metal, non-computerized machines, and may be attached to the head of your machine or under the throat of your machine; or use on other metal surfaces.